Printing press attachment



June 21, 1932.

J. N. CANN ING PRINTING PRESS ATTACHMENT Original Filegl May 3, 1928 2 Sheets-Sheet l IN VEN TOR. 1M canniw w ,m; Q, 2A.. 1;.

A Traw- June 1932- J. N. CANNING PRINTING PRESS ATTACHMENT 2 Sheets-Sheet 2 Original Filed May 3, 1928 ATTORNEY Patented June 21, 1932 UNITED, STATES JOSEPH N. GANNIN G, 0F TAMPA, FLORIDA PRINTING PRESS ATTACHMENT Application filed May 3, 1928, Serial The present invention relates to stop mechanism for use particularly inmachines wherein webs or strips are fed, such as in printing presses for printing on tissue paper and the like, and has for an object to stop the operation or motion of the printing press whenever there is an accumulation of paper or other irregularity in the feed which increases tension on the'web, and which would ordinarily cause the tearing of the web and necessitate the rethreading of the same through the entire press.

Another object of the invention is to provide a stop mechanism which readily responds to slight variations in pressure and which is in the natureof a circuit closer for actuating any suitable electrical devicesfor opening the circuit to the main drive motor of the press so'as to bring the machine to a state of rest.

A further object of'the. invention is to provide a stop device which may be adjusted so as to disregard a trifling accumulation of paper or Waste, which would notyinjure the machine; the device being operable only when an injurious amount of paper has accumulated. Further, when the device is tripped the press cannot be started until this accumulation has been removed, which latter action automatically resets the stop device.

The invention also aims at the provision of a device which maybe readily mounted upon the frame of the printing press adjacent the run of the web and in such position that a plurality of fingers or projections engage the web and are so disposed that they may be deflected by the accumulation or bunching of the web to close a primary circuit and actuate a suitable main circuit controlling device.

With theforegoing and other objects in view, the invention will be more. fully described hereinafter, and will be morerparticularly pointed out in the claims appended hereto. I

In the drawings, wherein like symbols refer to'li'ke orcorresponding parts throughout thesevera'lfviews, r

' Figure I is a side-elevation of a portion of a printing press or the like and-"showing No. 274,860. Renewed May 4, 1932.

diagrammatically an electric means for stopping the motion of the press under control of Y the device constructedaccording to the present lnvent-ion.

Figure 2' is a 'detailtop plan'view of the stop device, partly broken away on an'enlarged scale. I

Figure 3 is a transverse section taken through the same substantially in line with one of the circuit closing devices."

Figure 4 is a perspective View of a modified form ofthe device.

Figure" 5 is a transverse section taken through the same and substantially through I fit) slightly I one of the fingers or feelers of the device, and

. F igu're-6 is a front elevation of a portion of the device, enlarged, 'showingfthe; stationary contact strip in relation to the flexible finger or feeler.

Referring to the drawings, and first to Fig ure 1' which shows one application ofthe invention, 10 designates a collecting cylinder of a printing press, 11 a driving tapeat one side of the cylinder 10 to hold the web in place and which is supported on the rollers 12, and '75 13 designates the switches or fingers cooperating with the tape 11 and the cylin'derlOg' In this type of printing press, the large'c0llecting cylinder 10 carries the paper, and at predetermined intervals the paper is lifted so ofl lt-he cylinder 10 by the switches or: fly fin from '13. The collecting cylinder 10 usually receives from two' to four sheets suitably clamped and Wrapped thereon, and at predetermined times the fly fingers 13 are moved 8 over against the cylinder 10, as shown in dot ted lines in Figure 1, to catch the free edges of' the "sheets which are freed in the usual manner. This structure is shown diagram matically in Figure l as it forms no part of" the present invention and is shown in numerous prior patents among'which may be mentioned the following: Nos. 50,5.442-Sep- Ltember 26, 1893 to'Crowell; 717,487'December 30, 1902to Wood; and 1,691.891November13. 1928 to Meisel. The driving tapell,

immediately in front of the cylinder 10 holds the paper in place until it is picked 'up by the switches 13. 'It is" at the pointof contact ofthe s'witches 13*withthe cylinder lOthat l torn paper and waste accumulate which, if allowed to go unchecked, will cause these switches to bind, and consequently to tear the paper.

The stop device of this invention is preferably mounted between the runs of the tape 11 opposite the free ends of the switches or fingers 13, and in a position facing toward the fingers 13. While any suitable means of support for the stop device may be provided, bracket arms 14 and 15 are shown which'may be in any desired number and disposed in any adaptable relation to the stop device and the frame of the press. V

The stop device comprises an anglebar 16 of suitable length to extend across and beyond the driving tape 11, and at opposite ends may be secured to the bracket arms 14 and 15 by means of screws 17. An insulating beam 18, of wood or other suitable material, of substantially right angular cross section is secured by screws 19 or the like into the angle of the bar 16. g

At suitable intervals throughout the length of the beam 18, the latter is provided with sockets 20 which are relatively small and open through the inner face of the beam and are disposed horizontally with reference to the position of the device shown in Figure 3. V

The bar 16 may have openings 21 through its rear flange to register with the, sockets 20 for permitting the longitudinal attachment of flexible fingers 22 which are slidably disposed in the sockets 20 and adapted to project from thefront face of the beam 18 to the desired extent. Each finger 22 comprises preferably a coil spring or other suitable flexible element adapted to conduct electricity and which is secured in adjusted position in its socket 20 by a set screw 23,which is threaded upwardly through the bar 16 and beam 18 and against the finger 22. Each binding screw 23 may be secured in adjusted position by lock nuts 24 and the screws 23 form conductors from the metal bar 16 to the individual fingers 22. A binding post 25 is mounted on the end of the bar 16 and to which is attached a wire 26 from one side of a primary circuit which may include a magnet 27, a battery 28, and a second wire 29. y

The beam 18 is provided in its outer face withv a larger socket or counter bore 30 at the outer end of each socket 20 and in which is seated an outer coil spring or sleeve 31 spaced about the finger 22 by an insulating bushing 32 and clamped in the socket 30 by a set screw 33, one for each sleeve 31. The set screws 33 extend through a conductor bar 34 which extends across the top of the beam 18, so as to connect all of the sleeves-31 to the bar 34, and

the bar 34 atone end is connected to the wire 1 The magnet27, or any other desired electricaldevice, when energized attracts an armature 35which may break a circuit 36 to the motor 37, which operates the printing press so that the motor and the press will be brought to a state of rest when the magnet 27 is operated.

When there is an undue accumulation of torn paper or waste between the cylinder 10 in Figures 4, 5 and 6, the angle bar 38 which is mounted on the press frame is provided with a beam 39 of insulating material and the latter has a plurality of sockets 40 which extend through the beam 39 for receiving flexible fingers 41 which project outwardly from the front face of the beam. The rear flange of the bar 38 has openings 42 therein which register with the sockets 40 to admit of the lengthwise adjustment of the fingers 41. The fingers 41 are clamped in adjusted position by set screws 43 which project into the beam 39' through a top strip 44 carried on the, beam to make electrical connection with all of the fingers 41. The strip 44 is connected to the wire 29 of the primary circuit. Y c

The other side of the circuit, through wire 26, is connected to aconductor strip 45, which is secured to the front face of the beam 39 and is provided with notchesor recesses 46 in its upper edge'adapted to receive the lower and side portions ofthe fingers 41 therethrough, thenotches 46 providin marginal contact edges which are normally spaced from the finger 41 and which are adapted to engage the same when the fingers 41 are deflected to any appreciable extent.

In the operation of this modified form of the stop device, when the tape 11 exerts undue pressure uponthe outer ends-of the fingers the latter are bent or deflected, and when deflected to the desired extent the fingers are brought into contact with the edges of the front contact. bar 45 to complete the circuit through the fingers 41.

The fingers 22 and 41, and the sleeve 31, are preferably made in the form of coil springs, or any other suitable construction may be employed for giving the desired flexibility to these parts, and the fingers and the sleeve are capable of longitudinal adjustment .with respect to each other and to the beam 39. j Y V It is obvious that various changes and modifications may be made in the details of constructionand design of the above specifically described embodiment of this invention without departing from thexspirit thereof,

stricted only by the scope of the following claims.

What is claimed is:-

1. A stop device for machines having a material feed, comprising an angle bar adapted to be secured to the machine adjacent one side of the material, an electric nonconducting beam mounted in said bar and having a plurality of sockets therein openingtoward the material, flexible fingers seated in the sockets, means for adjustably holding the fingers in the sockets with the fingers in close proximity to the material, means for connecting the fingers to one side of an electric circuit, and circuit closing means connected to the other side of the electric circuit and mounted on the beam in position to engage the fingers when deflected by abnormal pressure of the material thereon.

2. A stop device for machines having a tape feed comprising a beam adapted to be secured across the machine at one side of the tape, said beam having a plurality of open ings therethrough, a coil spring finger slidably fitted in each opening, a set screw for each finger carried by the beam and adapted to bind the finger in adjusted position in the beam, said fingers adapted to engage the tape at their outer ends, an upper contact strip connected to one side of the circuit and engaging all of the set screws, a second contact strip mounted on the face of the beam and connected to the other side of the circuit and having openings therein for receiving the intermediate portions of the fingers therethrough, said openings being of a slightly greater diameter than the external diameter of the fingers and disposed with the marginal edges of the openings for contact with the fingers when the latter are deflected to close the circuit.

J OS. N. CANNING. 

